The input object may be a QueueStreamer, which the compile
server will still have a reference to (even though
downstream the memory object API and parser API thinks it
has a unique_ptr). Terminate the thread quickly on error,
instead of free'ing and causing a use-after-free.

Also set up a report_fatal_error handler which has access
to the server's state. This allows the server to record the
error and stop pushing bytes to the QueueStreamer.
Otherwise the QueueStreamer can get full without a consumer
still active to unblock.

Unfortunately the fatal error handler only terminates the
current thread, and not all worker threads. NaCl doesn't
have support for signals or pthread_kill.
E.g., with pthread_kill(std_thread.native_handle(), SIGABRT).
So, other worker/emitter threads will have to hang waiting on
more input or something.

Random clang-format edits from 3.7.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4163
TEST= tbd:

I manually ran the translator a dummy text file (invalid bitcode
header), and observed that this no longer crashes. Instead the SRPC
calls finish and I see:

3> [17812,4147750656:14:23:02.025382] Streaming file at 100000 bps
[17812,4147750656:14:23:12.511574] RPC call failed: Rpc application returned an error.
[17812,4147750656:14:23:12.511625] StreamChunk failed
[17812,4147750656:14:23:12.511655] stream_file: SendDataChunk failed, but returning without failing. Expect call to StreamEnd.4> rpc call initiated StreamEnd::isss
[17812,4147750656:14:23:12.511931] RPC call failed: Rpc application returned an error.
rpc call complete StreamEnd::isss
output 0:  i(0)
output 1:  s("")
output 2:  s("")
output 3:  s("Invalid PNaCl bitcode header")
[17812,4147750656:14:23:12.512102] Command [rpc] failed.

R=kschimpf@google.com, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1168543002